Chables dear



QUNTEB fTiTiT@ CHARLES DEAR, OF LONDON, ENGLAND, ASSGNOR T THE MEtIS STEEL COMPANY LIMITED, OF LONDON, ENGLAITI.

MANUFACTURE GF STEEL.

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Specification of Letters Patent.

Patented 2?,

Application led December 30, 1916. Serial No. 139,909.

To all wiz om, 'it ymay won/:ern:

Be it known that l, CHARLES DEAR, a sub `ieet of the King et' Lngland, residing 1n London, England, have invented certain new and useful improvements in the Manufacture of Steel, ot which the following 'is a specification.

This invention relates to the 'manufact-ure of steel and has for its object the provision o't' apparatus suitable for expeditiously and uniformly handling ingots that are to be plunged into a bath ot' water or .liquid solution while still hot, that is to say before they have cooled from the heat of eastin'.

Ace-Ording to the present invention, for the treatment of hot steel ingots hy the aforesaid process there are provided in eom bination a tank to contain the liquid in Which the ing'ots are to be immersed, two reservoirs each of which is of a capacity not less than that oi the tank and both ot' which are connected with the tank. and means to transfer the liquid contents of the tank to and from either reservoir at will; preferably a cooling device is provided to cool the liquid either in its passage from tank to reservoir or vice-versa, or while it is in the reservoir.

rIhe present invention further provides a tank to constitute the iminersing tank eooperating with two reservoirs, each of which is of a Capacity not less than that of the tank, so situated and connected that the liquid contents of one reservoir can gravitate into the second and the liquid contents of the sec-ond can gravitate into the tank, together with a pump for transferringthe liquid contents of the tank into the first said reservoir. To this apparatus a third reservoir may he added of less capacity than either ot the other two, to contain tresh liquor or water to make goed the loss by evaporation and wastage.`

The tank is preferably constructed with a partition whereby ingots mmersed upright, in it are prevented from falling over, and preferably there extends over the hottorn of the tank a grat-ing through the interstiees of which sludge eau pass so that ingots stand on the ,grating elear otthe sludge.w

The tank may, however, he made of suoh dimensions as to receive an ingot with its length'horizontal, or approximately so, and

of sueh a depth that, in cooperation with means provided for the purpose. the iugot may he, by a continuonsoperation. lowered with its length htn'izontal or approximately so, down to the t'ull predetermined depth oi nninersion and then raised clear ot' the liquid; the said depth and lowering means are so devised that when the ingjot emerges from the liquid it has heen sullieieutlv cooled not to reealesee. i

lhnhodimeuts ot' this invention are illus# trated in the accompanying drawings in whiehi i Figure l is a diagrammatic pian ot one arrangement ot apparatus;

Fig, 2 is a perspective view ot a portion of .one construction ot'y tank to be eniployed with the apparatusl o'l Fig. l;

Fig. 3 is a diagrammatic view, similar to Fig. l. ot' a moditied arrangement;

Fig. -l is a view in elevation et a detail to he employed with the apparatus ota Fig. 3.

Fig. 5 is a diagrannnatitside elevation ot' the arrangement of the apparatus shown in Fig. l, and

Fig. is a similar view of the apparatus shown in 3.

The apparatus shown in Fig. l comprises an immersing tank [t situated with its per edge approximately at ground level and connected through a pump l@ with a reservoir l et, say. 10.00() zgallons capacity situated suilieiently high ahove the `round level to accommodate at a. level below it andy ahove the zground level a second reservoir C et equal Capacity. The pump iii is provided to draw the liquid contents from the tank and deliver them into the reservoir Piping and y'alves are provided so that the liquor can then gravitate under eon'trol into the reservoir C, and again tronrthis into the tank A, as and when desired. third reservoir l.) of. say 5,000 gallons capacity is provided at about the level oi the seoond reservoir C and connected to the pump E and the reservoir C hy piping and valves. The object ot' the reservoir D is to serve as a reserve of liquor which may he drawn upon to make goed evaporation and wastage of the main liquor.

The tank A is of, say, 10,000 gallons eapaeity and has its floor covered hy a grating F, seen in Fie; 2, of from 6 to l2 inches thick on which the ingots are to be stood.

Milf? A frame-workv G of T-iron bars is secured vto the sides of the tank about half Way from .the top, the frame-work constituting an and delivered into the reservoir B, with the advantage that the volume of steam in the neighborhood of the tank impeding the operation of removing the ingots is greatly reduced. The ingots are then removed by means of dogs instead of slings, which operation is greatly facilitated by the facts that they are fully exposed to Viewv and that there is less 'steam present than if the liquor had been left standing in the tank.

As above stated the capacity of the reservoirs Band C is not less than the capacity of the tank A. After the ingots have been cooled in the tank A, the liquid is pumped to the tank B, in which it is partially cooled. When it is desired to immerse another batch of ingots the cooled liquid is run from the reservoir C to the tank A, and the partially cooled liquid is run from the reservoir B to the reservoir C, in which it is further cooled before it is delivered to the tank A.

In the arrangement shown in Fig. 3, an

immer-sing tank A of, say, 5,000 gallonsa:H

' 5,000 gallons capacity are provided .and one reservoir and the tank are charged with the water or aqueous solution in which the ingot is to be immersed. The tank is connected with both reservoirs through convenient piping and valves and a pump K are provided to enable the liquid contents of the tank to be expeditiously transferred from it to either of the reservoirs or vice versa at will.

A crane Il is arranged at the side of the tank and so geared and driven that, when continuously operated from the ,moment when an` ingot'carried by it isabout to enter the liquid in the tank, the ingot is lowered to a predetermined depth and then raised, at such a rate that the immersion has sufliciently cooled the ingot to prevent its recalescing after emerging from the liquid.

Between each reservoir and the tank, and

connected'in the pipe linel between the reservoir and tank is a cooling device M of anyy desired construction and a filter-press O is provided for each reservoir and so connected that the contents can be iltered as and when desired.

At the bottom of the tank are' trestlesP,

as shown in Fig. 4, to receive the ingot R and to support it clear'of the bottom of the tank by a distance of about l foot.

The loss by evaporation or wastage in a structure such as shown in Fig. 3 lmay be made up from any suitable source. The liquid in the tank'should not rise to a tempera .ure above about 120 F. and when thus heat d it should bepumped into the empty reservoir and cooled either on itsv way thither or when next returned from the l reservoir back into the tank. When the tank has been thus emptied of the hot liquid, cool liquid is run in from the other reser- Voir, whereupon the tank is ready for the treatment of another cast.

W'hat I claim as my invention and desire to secure by Letters Patent 1s 1. In apparatus for immersing hotsteel ingots in a liquid bath, the combinationof an immersing tank, means to lower an ingot into and raise it out of the tank, two reservoirs each of a capacity not less than the capacity of the tank, ducts connecting the interior of the tank with both reservoirs, and means to transfer the bath liquid from 'the ltank to either reservoir.

2. In apparatusfor immersing hot steel ingot'swin a liquid bath, the combination of an immersing tank, means to lower an ingot into and raise it out of the tank, two reservoirs located above the tank so that the liquid can gravitate from the reservoirs to lthe tank, and a pump whose suction is connected to the tank and whose delivery is connected with the first reservoir substantially asset forth.

3. In apparatus for immersing hot steel ingots in a liquid bath, the'combination of an immersing tank, means to lower the ingot into the tank with its length approximately horizontal such that continuous operation ofthe said means successivel lowers the ingot to full submersion and t en raises it, two reservoirs, ducts connecting the interior of the tank with both reservoirs, and means to transfer the bath liquid from the tank to either reservoir.

4. In apparatus for immersing hot steel ingots in a liquid bath, the combination of an immersing tank, means to lower the ingot into and raise it out of the tank, two reservoirs, ducts connecting the interior of the tank with both reservoirs, means to cool theliquid in its passage from the tank to the reservoir, and means to transfer the bath liquid' from the tank to either reservoir.

5. In apparatus for immersing hot steel ingots vin a liquid bath, the-combination of an immersing tank, means to lower the ingot into and raise it out of the tank, two reserf voirs, ducts connectingthe-interior of the tank with both reservoirs, means to cool the liquid in itspassage from the tank to the l means to empty, the tank and. t'ansfer the liquid to either eseivoi'.Q

'6. In apparatus for immersing hot steel ingots in a liquid bath, Combination an immersing tank, means so lower the ingot into and mise it oui of the tank, two fessi'- voirs, ducts connecting the intez'ior of the bath tank/With both reservoirs, means to transfer the liquid from the tank to the reservoirs and a third tank Conneced tothe system for supplying the loss of liquid.

'i testimony Whaf'eml have signedgrny name to this specification.

' CHARLES DEAR. 

